| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.beam.runners.spark.io; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.Set; |
| import org.apache.beam.runners.spark.examples.WordCount; |
| import org.apache.beam.sdk.coders.StringUtf8Coder; |
| import org.apache.beam.sdk.io.TextIO; |
| import org.apache.beam.sdk.testing.TestPipeline; |
| import org.apache.beam.sdk.transforms.Create; |
| import org.apache.beam.sdk.transforms.MapElements; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.Sets; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.io.Files; |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TemporaryFolder; |
| |
| /** Number of shards test. */ |
| public class NumShardsTest { |
| |
| private static final String[] WORDS_ARRAY = { |
| "hi there", "hi", "hi sue bob", |
| "hi sue", "", "bob hi" |
| }; |
| private static final List<String> WORDS = Arrays.asList(WORDS_ARRAY); |
| |
| private File outputDir; |
| |
| @Rule public final TemporaryFolder tmpDir = new TemporaryFolder(); |
| |
| @Rule public final TestPipeline p = TestPipeline.create(); |
| |
| @Before |
| public void setUp() throws IOException { |
| outputDir = tmpDir.newFolder("out"); |
| outputDir.delete(); |
| } |
| |
| @Test |
| public void testText() throws Exception { |
| PCollection<String> inputWords = p.apply(Create.of(WORDS).withCoder(StringUtf8Coder.of())); |
| PCollection<String> output = |
| inputWords |
| .apply(new WordCount.CountWords()) |
| .apply(MapElements.via(new WordCount.FormatAsTextFn())); |
| output.apply( |
| TextIO.write().to(outputDir.getAbsolutePath()).withNumShards(3).withSuffix(".txt")); |
| p.run().waitUntilFinish(); |
| |
| int count = 0; |
| Set<String> expected = Sets.newHashSet("hi: 5", "there: 1", "sue: 2", "bob: 2"); |
| for (File f : |
| tmpDir.getRoot().listFiles(pathname -> pathname.getName().matches("out-.*\\.txt"))) { |
| count++; |
| for (String line : Files.readLines(f, StandardCharsets.UTF_8)) { |
| assertTrue(line + " not found", expected.remove(line)); |
| } |
| } |
| assertEquals(3, count); |
| assertTrue(expected.isEmpty()); |
| } |
| } |